hujun5

sched: replace sync pause with async pause for

1

## Summary In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to simplify the implementation of critical sections. The goal is to...

sched: replace sync pause with async pause for setpriority

1

## Summary In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to simplify the implementation of critical sections. The goal is to...

sched: replace sync pause with async pause for nxtask_terminate

1

## Summary In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to simplify the implementation of critical sections. The goal is to...

change nxsched_islocked_global to nxsched_islocked_tcb

1

## Summary 1 To improve efficiency, we mimic Linux's behavior where preemption disabling is only applicable to the current CPU and does not affect other CPUs. 2 In the future,...

percpu reg store this_task

1

## Summary We can utilize percpu storage to hold information about the current running task. If we intend to implement this feature, we would need to define two macros that...

qemu: fix smp boot not enter idle

3

## Summary fix smp boot not enter idle Configuring NuttX and compile: $ ./tools/configure.sh -l qemu-armv8a:nsh_smp $ make Running with qemu $ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic \ -machine...

mm: replace mutex with spinlock in the implementation of memory allocation

2

## Summary 1. Since memory allocation operations are all non-blocking, we can replace mutex with spinlock. 2. Spinlock is significantly faster than mutex, improving the real-time capability and performance of...

add a reference count to the TCB to prevent it from being deleted.

11

## Summary add a reference count to the TCB to prevent it from being deleted. To replace the large lock with smaller ones and reduce the large locks related to...

sched/task: remove the check for whether tcb is NULL

4

## Summary sched/task: remove the check for whether tcb is NULL We should not call these functions before nx_start; therefore, this_task will not be empty. If these functions are called...

add a reference count to the TCB to prevent it from being deleted.

2

## Summary add a reference count to the TCB to prevent it from being deleted. To replace the large lock with smaller ones and reduce the large locks related to...